CN108488466A - Control method and control device for gas ratio valve - Google Patents
Control method and control device for gas ratio valve Download PDFInfo
- Publication number
- CN108488466A CN108488466A CN201810218460.XA CN201810218460A CN108488466A CN 108488466 A CN108488466 A CN 108488466A CN 201810218460 A CN201810218460 A CN 201810218460A CN 108488466 A CN108488466 A CN 108488466A
- Authority
- CN
- China
- Prior art keywords
- gas ratio
- ratio valve
- current signal
- aperture
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The embodiment of the present invention provides a kind of control method and control device for gas ratio valve, belongs to technical field of electric appliances.The control method includes：Based on the expectation aperture of the required gas ratio valve, determine that current signal corresponds to the variation range of the expectation aperture；And the current value of the control current signal back and forth changes in the variation range, so that the aperture of the gas ratio valve remains the expectation aperture.In the technical solution of the present invention, when needing the aperture by gas ratio valve to become the aperture needed for user, back and forth changed in corresponding variation range by the current value of control electric current signal, the influence controlled gas proportion valve opening due to magnetic hysteresis can be reduced, so that more accurate to the control of gas proportion valve opening.
Description
Technical field
The present invention relates to technical field of electric appliances, are filled more particularly to a kind of control method for gas ratio valve and control
It sets.
Background technology
At this stage, most of gas ratio valves have electromagnetic coil, since magnetic hysteresis, electromagnetic wire can occur for electromagnetic coil
Circle has mobile the characteristics of lagging.Specifically, when externally-applied magnetic field is applied on the ferromagnet of gas ratio valve (such as iron), and it is former
When the dipole of son is arranged according to externally-applied magnetic field, hysteresis will occur.Even if externally-applied magnetic field is withdrawn, component arrangement is still protected
It holds, and at this point, ferromagnet has been magnetized.Therefore, once being magnetized, ferromagnet will indefinitely magnetize.
Due to magnetic hysteresis, flowing lag as shown in Figure 1 can occur for gas ratio valve.As shown in Figure 1, when by changing combustion gas
When aperture of the size of current of proportioning valve to change gas ratio valve, since there are hysteresis for gas ratio valve, when electric current increases
When (corresponding to right side graph) greatly and declining (corresponding leftmost curve), corresponding electric current-opening curve is different, so causing to rise
When with declining, even if under same size of current, the aperture of gas ratio valve is different, so as to cause gas ratio valve is passed through
Load and flue gas are also different, making it difficult to realize accurately controlling to the aperture of gas ratio valve.
Invention content
In order to solve the above-mentioned problems in the prior art at least partly, the purpose of the embodiment of the present invention is to provide one
Control method and control device of the kind for gas ratio valve.
To achieve the goals above, the embodiment of the present invention provides a kind of control method for gas ratio valve, the combustion
The aperture of gas proportioning valve is controlled by the current signal on its electromagnetic coil, and the control method includes：Based on required
The expectation aperture of the gas ratio valve determines that the current signal corresponds to the variation range of the expectation aperture；And control
The current value of the current signal back and forth changes in the variation range, so that the aperture of the gas ratio valve remains
The expectation aperture.
Optionally, back and forth variation includes the current value of the control current signal in the variation range：Control
The current value of the current signal is between the first boundary value and the second boundary value of the variation range with prefixed time interval
Constantly switching.
Optionally, the first boundary value and the second boundary value and the prefixed time interval pass through described in detection
Whether the secondary pressure of gas heater meets preset requirement and predefines where gas ratio valve.
Optionally, the pwm control signal of the gas ratio valve is input to by change to change the current signal
Current value.
Optionally, described that the pwm control signal of the gas ratio valve is input to change the electric current letter by change
Number current value include：Change the current value of the current signal by changing the duty ratio of the pwm control signal.
On the other hand, the present invention also provides a kind of control device for gas ratio valve, the gas ratio valve is opened
Degree controlled by the current signal on its electromagnetic coil, the control device be configured as include：Determining module is used for base
In the expectation aperture of the required gas ratio valve, determine that the current signal corresponds to the variation range of the expectation aperture：
And control module, the current value for controlling the current signal back and forth changes in the variation range, so that described
The aperture of gas ratio valve remains the expectation aperture.
Optionally, the control module controls the current value of the current signal reciprocal variation packet in the variation range
It includes：The current value of the current signal is controlled between the first boundary value and the second boundary value of the variation range with it is default when
Between be spaced constantly switching.
Optionally, the first boundary value and the second boundary value and the prefixed time interval pass through described in detection
Whether the secondary pressure of gas heater meets preset requirement and predefines where gas ratio valve.
Optionally, the control module is by changing the pwm control signal for being input to the gas ratio valve to change
State the current value of current signal.
Optionally, the control module is by changing the pwm control signal for being input to the gas ratio valve to change
The current value for stating current signal includes：Change the electricity of the current signal by changing the duty ratio of the pwm control signal
Flow valuve.
In the technical solution of the present invention, when needing the aperture by gas ratio valve to become the aperture needed for user, pass through
The current value of control electric current signal back and forth changes in corresponding variation range, can reduce and be opened gas ratio valve due to magnetic hysteresis
The influence for spending control, so that more accurate to the control of gas proportion valve opening.
The other feature and advantage of the embodiment of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is further understood to the embodiment of the present invention for providing, an and part for constitution instruction, under
The specific implementation mode in face is used to explain the embodiment of the present invention together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure：
Fig. 1 is gas ratio valve in electric current ascent stage and the electric current of electric current decline stage-opening curve figure；
Fig. 2 is the flow chart for the control method for gas ratio valve that one embodiment of the present invention provides；
Fig. 3 is the electric current-opening curve figure for the gas ratio valve that one embodiment of the present invention provides；And
Fig. 4 is the block diagram for the control device for gas ratio valve that one embodiment of the present invention provides.
Specific implementation mode
The specific implementation mode of the embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this
The described specific implementation mode in place is merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
Fig. 2 is the flow chart for the control method for gas ratio valve that one embodiment of the present invention provides.Such as Fig. 2 institutes
Show, provides a kind of control method for gas ratio valve in embodiment of the present invention, the aperture of the gas ratio valve passes through it
Current signal on electromagnetic coil is controlled, and the control method includes：
Step S101, the expectation aperture based on required gas ratio valve, determines the electricity on gas ratio valve electromagnetic coil
Flow the variation range that signal corresponds to the expectation aperture.
The current value of step S102, control electric current signal back and forth change in the variation range, so that gas ratio valve
Aperture remain desired aperture.
Specifically, the aperture of gas ratio valve is related with the size of the current signal on its electromagnetic coil, as electric current is believed
Number variation, the aperture of gas ratio valve can change accordingly.Namely when using gas ratio valve, different apertures corresponds to
The different current values of current signal.In the present embodiment, when needing the aperture by gas ratio valve to become opening needed for user
When spending (it is expected aperture), the current value of meeting control electric current signal back and forth changes in corresponding variation range, so that back and forth
The current value of the current signal of variation is equivalent to the corresponding current value of the aperture, so that gas ratio valve is maintained at this
It is expected that aperture.Different apertures corresponds to different variation ranges, which can be previously obtained and stored by experiment
In the control device of gas ratio valve.
In the technical solution of the present invention, when needing the aperture by gas ratio valve to become the aperture needed for user, pass through
The current value of control electric current signal back and forth changes in corresponding variation range, can reduce and be opened gas ratio valve due to magnetic hysteresis
The influence for spending control, so that more accurate to the control of gas proportion valve opening.
In a kind of optional embodiment of the present invention, the current value of the control current signal is past in variation range
Change again and includes：The current value of control electric current signal between the first boundary value and the second boundary value of variation range with it is default when
Between be spaced constantly switching.
Specifically, when needing control electric current signal back and forth to change in a certain variation range, it can make current signal
Current value constantly change between two boundary values of the variation range, you can with the current value of first control electric current signal for the
One boundary value, and after keeping prefixed time interval, current value is being switched to the second boundary value, then keeping identical pre-
If after time interval, then being switched to first boundary value, and so on change.For example, when variation range is 7mA-8mA, first
Boundary value is 7mA, and the second boundary value is 8mA, when need the current value of control electric current signal in the variation range of 7mA-8mA
When interior variation, it can first make that current value is 7mA, and after maintaining 0.1s, current value is become into 8mA, after maintaining 0.1s, then
It becomes current value again 7mA, and so on changes.
By repetition test, reasonable set first boundary value and the second boundary value and prefixed time interval, you can so that
The current value of the reciprocal current signal is equivalent to the current value corresponding to corresponding aperture.
Fig. 3 is the electric current-opening curve figure for the gas ratio valve that one embodiment of the present invention provides.As shown in figure 3,
In a kind of preferred embodiment of the present invention, when the aperture of required gas ratio valve is Q, by allowing on gas valve electromagnetic coil
Current signal between the B points of ascending curve and the C points of decline curve constantly reciprocally swinging, can be by combustion gas curve matching
To the curve between raising and lowering, i.e., the current value of current signal at this time is equivalent to arrive A points, and electric current-opening curve is equivalent to be arrived
Intermediate curve, reduces the aperture error of gas ratio valve with this.
In a kind of optional embodiment of the present invention, the pwm control signal of gas ratio valve can be input to by changing
To change the current value of current signal.Specifically, electric current letter can be changed by constantly changing the duty ratio of pwm control signal
Number current value so that current value constantly reciprocal variation between first boundary value and the second boundary value.
In specific implementation, first boundary value and the second boundary value and prefixed time interval are all true in advance by testing
Fixed, for different apertures, need to choose different first boundary values and the second boundary value and prefixed time interval.So
And for the easier above-mentioned first boundary value of determination and the second boundary value and prefixed time interval, of the invention preferred real
It applies in mode, for different apertures, the difference width W between first boundary value and the second boundary value and prefixed time interval t
Identical value may be used.When experiment, at least one gas proportion valve opening can be chosen as test aperture, made as far as possible
In the case that gas ratio valve keeps the test aperture, choose multiple prefixed time interval t and difference width W and be respectively combined
It is tested, with determination suitable difference width W and prefixed time interval t, so that the aperture of gas ratio valve is the most steady
It is fixed.Difference width W and prefixed time interval t identical with test aperture is chosen subsequently, for other apertures, it is only necessary to according to
Each aperture tests and records corresponding boundary value.
It is true when needing for the gas ratio valve in gas heater in a kind of optional embodiment of the present invention
It, can be by detecting the secondary pressure of the gas heater (i.e. in gas heater when determining the aperture of gas ratio valve and whether stablizing
Operating pressure of the gas ratio valve to combustion chamber) whether meet preset requirement to determine.Specifically, at the trial, for aperture
For Q the case where, in the case where keeping aperture Q, can by C points between B points change current value difference width W and
Prefixed time interval t tests the change of the pressure value of the secondary pressure under the combination of different difference width W and prefixed time interval t
Change amplitude, and carried out with the amplitude of variation for the pressure value for using secondary pressure when the existing progress aperture regulation using constant current
Compare, to find suitable difference width W and prefixed time interval t, so that using the suitable difference width W and in advance
If when time interval t, the pressure value of secondary pressure is more stable, finally matched difference width W and prefixed time interval t are applied to
On the gas heater.
Fig. 4 is the block diagram for the control device for gas ratio valve that one embodiment of the present invention provides.Such as Fig. 4 institutes
Show, embodiment of the present invention also provides a kind of control device for gas ratio valve, and the aperture of the gas ratio valve passes through it
Current signal on electromagnetic coil is controlled, which is configured as including determining module 10 and control module 20.Its
In, determining module 10 is used for the expectation aperture based on required gas ratio valve, determines that current signal corresponds to the expectation aperture
Variation range.Current value of the control module 20 for control electric current signal back and forth changes in variation range, so that combustion gas
The aperture of proportioning valve remains desired aperture.
In a kind of optional embodiment party of the present invention, control module 20 can changed by the current value of control electric current signal
Constantly switched with prefixed time interval between the first boundary value and the second boundary value of range, to realize the electricity of control electric current signal
Flow valuve back and forth changes in variation range.
In a kind of optional embodiment of the present invention, first boundary value and the second boundary value and prefixed time interval can be with
It is predefined by whether the secondary pressure of gas heater meets preset requirement where detecting gas ratio valve.
In a kind of optional embodiment of the present invention, control module 20 is input to the PWM controls of gas ratio valve by changing
Signal processed changes the current value of current signal.Preferably, electric current can be changed by changing the duty ratio of pwm control signal
The current value of signal.
In addition, specific implementation mode of the above-mentioned example for the control device of gas ratio valve has been used in above-mentioned example
It is explained in detail in the embodiment of the control method of gas ratio valve, details are not described herein.
In the technical solution of the present invention, by the electric current that is constantly changing on gas ratio valve electromagnetic coil to make combustion gas
The lag of proportioning valve minimizes, so that subsequent combustion system can obtain more stable gas input, eliminates by itself
Harmful gas input skew caused by magnetic hysteresis.For gas heater, the hysteresis quality for eliminating gas ratio valve itself has
Conducive to ensure gas heater cleaning burning and it is environmental-friendly, also, due to technical solution of the present invention can preferably to combustion
The aperture of gas proportioning valve is controlled, so as to realize the efficient adjusting to gas heater temperature.
The optional embodiment of the embodiment of the present invention is described in detail above in association with attached drawing, still, the embodiment of the present invention is simultaneously
The detail being not limited in the above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection domain of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the embodiment of the present invention pair
Various combinations of possible ways no longer separately illustrate.
It will be appreciated by those skilled in the art that it is that can pass through to implement the method for the above embodiments
Program is completed to instruct relevant hardware, which is stored in a storage medium, including some instructions are used so that single
Piece machine, chip or processor (processor) perform all or part of the steps of the method described in the various embodiments of the present invention.And it is preceding
The storage medium stated includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory
The various media that can store program code such as (RAM, Random Access Memory), magnetic disc or CD.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, disclosure of that of the embodiment of the present invention is equally should be considered as.
Claims (10)
1. a kind of control method for gas ratio valve, which is characterized in that the aperture of the gas ratio valve passes through its electromagnetism
Current signal on coil is controlled, and the control method includes：
Based on the expectation aperture of the required gas ratio valve, determine that the current signal corresponds to the variation of the expectation aperture
Range；And
The current value for controlling the current signal back and forth changes in the variation range, so that the gas ratio valve is opened
Degree remains the expectation aperture.
2. control method according to claim 1, which is characterized in that the current value of the control current signal is in institute
It states back and forth to change in variation range and includes：
The current value of the current signal is controlled between the first boundary value and the second boundary value of the variation range with default
Time interval constantly switches.
3. control method according to claim 2, which is characterized in that the first boundary value and the second boundary value with
And whether the prefixed time interval meets default want by the secondary pressure of gas heater where detecting the gas ratio valve
It asks and predefines.
4. control method according to claim 1, which is characterized in that be input to the gas ratio valve by changing
Pwm control signal changes the current value of the current signal.
5. control method according to claim 4, which is characterized in that described to be input to the gas ratio valve by changing
Pwm control signal include come the current value for changing the current signal：By change the duty ratio of the pwm control signal come
Change the current value of the current signal.
6. a kind of control device for gas ratio valve, which is characterized in that the aperture of the gas ratio valve passes through its electromagnetism
Current signal on coil is controlled, the control device be configured as include：
Determining module is used for the expectation aperture based on the required gas ratio valve, determines that the current signal corresponds to and is somebody's turn to do
It is expected that the variation range of aperture：And
Control module, the current value for controlling the current signal back and forth changes in the variation range, so that described
The aperture of gas ratio valve remains the expectation aperture.
7. control device according to claim 6, which is characterized in that the control module controls the electricity of the current signal
Back and forth variation includes flow valuve in the variation range：
The current value of the current signal is controlled between the first boundary value and the second boundary value of the variation range with default
Time interval constantly switches.
8. control device according to claim 7, which is characterized in that the first boundary value and the second boundary value with
And whether the prefixed time interval meets default want by the secondary pressure of gas heater where detecting the gas ratio valve
It asks and predefines.
9. control device according to claim 6, which is characterized in that the control module is input to the combustion by changing
The pwm control signal of gas proportioning valve changes the current value of the current signal.
10. control device according to claim 9, which is characterized in that the control module is input to described by change
The pwm control signal of gas ratio valve includes come the current value for changing the current signal：By changing the pwm control signal
Duty ratio change the current value of the current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810218460.XA CN108488466B (en) | 2018-03-16 | 2018-03-16 | Control method and control device for gas proportional valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810218460.XA CN108488466B (en) | 2018-03-16 | 2018-03-16 | Control method and control device for gas proportional valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108488466A true CN108488466A (en) | 2018-09-04 |
| CN108488466B CN108488466B (en) | 2020-03-17 |
Family
ID=63339476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810218460.XA Active CN108488466B (en) | 2018-03-16 | 2018-03-16 | Control method and control device for gas proportional valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108488466B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524634A (en) * | 2020-11-30 | 2021-03-19 | 芜湖美的厨卫电器制造有限公司 | Control method of water heater, water heater and readable storage medium |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6308667B1 (en) * | 2000-04-27 | 2001-10-30 | Visteon Global Technologies, Inc. | Actuator for engine valve with tooth and socket armature and core for providing position output and/or improved force profile |
| CN1746474A (en) * | 2004-09-08 | 2006-03-15 | 株式会社电装 | Fuel-jetting system |
| CN102953842A (en) * | 2011-08-29 | 2013-03-06 | 比亚迪股份有限公司 | Control method of electronic throttle valve |
| CN103547844A (en) * | 2011-02-21 | 2014-01-29 | 艾默生电气公司 | Valves, pressure sensing devices, and controllers for heating appliances |
| CN104033643A (en) * | 2013-03-06 | 2014-09-10 | 株式会社电装 | Current control device for solenoid, and method for controlling current of solenoid |
| CN104131884A (en) * | 2013-05-01 | 2014-11-05 | 三菱电机株式会社 | Wastegate valve control device for internal combustion engine and wastegate valve control method for internal combustion engine |
| CN104571149A (en) * | 2014-06-12 | 2015-04-29 | 北京七星华创电子股份有限公司 | Mass flow control device and control method for integrated gas conveying system |
| CN104703850A (en) * | 2012-10-05 | 2015-06-10 | 丰田自动车株式会社 | Vehicle brake control device |
| CN107194019A (en) * | 2016-03-15 | 2017-09-22 | 中国石油化工股份有限公司 | A kind of aperture regulation method and apparatus of choke valve |
| CN108240637A (en) * | 2018-02-26 | 2018-07-03 | 芜湖美的厨卫电器制造有限公司 | Control method, control system and the gas heating equipment of gas heating equipment |
-
2018
- 2018-03-16 CN CN201810218460.XA patent/CN108488466B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6308667B1 (en) * | 2000-04-27 | 2001-10-30 | Visteon Global Technologies, Inc. | Actuator for engine valve with tooth and socket armature and core for providing position output and/or improved force profile |
| CN1746474A (en) * | 2004-09-08 | 2006-03-15 | 株式会社电装 | Fuel-jetting system |
| CN103547844A (en) * | 2011-02-21 | 2014-01-29 | 艾默生电气公司 | Valves, pressure sensing devices, and controllers for heating appliances |
| CN102953842A (en) * | 2011-08-29 | 2013-03-06 | 比亚迪股份有限公司 | Control method of electronic throttle valve |
| CN104703850A (en) * | 2012-10-05 | 2015-06-10 | 丰田自动车株式会社 | Vehicle brake control device |
| CN104033643A (en) * | 2013-03-06 | 2014-09-10 | 株式会社电装 | Current control device for solenoid, and method for controlling current of solenoid |
| CN104131884A (en) * | 2013-05-01 | 2014-11-05 | 三菱电机株式会社 | Wastegate valve control device for internal combustion engine and wastegate valve control method for internal combustion engine |
| CN104571149A (en) * | 2014-06-12 | 2015-04-29 | 北京七星华创电子股份有限公司 | Mass flow control device and control method for integrated gas conveying system |
| CN107194019A (en) * | 2016-03-15 | 2017-09-22 | 中国石油化工股份有限公司 | A kind of aperture regulation method and apparatus of choke valve |
| CN108240637A (en) * | 2018-02-26 | 2018-07-03 | 芜湖美的厨卫电器制造有限公司 | Control method, control system and the gas heating equipment of gas heating equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524634A (en) * | 2020-11-30 | 2021-03-19 | 芜湖美的厨卫电器制造有限公司 | Control method of water heater, water heater and readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108488466B (en) | 2020-03-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2664924C1 (en) | Device for testing transformer and method of testing transformer | |
| RU2668614C1 (en) | Device for testing transformer and method of testing transformer | |
| US9222966B2 (en) | Test apparatus and test method | |
| CN103944550B (en) | Method for driving load | |
| Naghizadeh et al. | Modelling of inrush current in transformers using inverse Jiles–Atherton hysteresis model with a neuro-shuffled frog-leaping algorithm approach | |
| CN108488466A (en) | Control method and control device for gas ratio valve | |
| RU2013110831A (en) | DEVICE AND METHOD OF POWER SUPPLY IN THE SWITCHED MODE | |
| EP3035065A1 (en) | Device for testing control transformers | |
| CN112840218A (en) | Method for determining switching state of valve and solenoid valve assembly | |
| CN107860953B (en) | Three-phase electric energy metering module and calibration method thereof | |
| CN109387800B (en) | Magnetic sensor testing device | |
| JP2009168733A (en) | Thunder impulse voltage testing device | |
| CN104635142B (en) | Improve the test device and test method of test accuracy | |
| CN107390140B (en) | Power supply testing method and equipment | |
| CN114688744A (en) | Gas water heater and sectional switching performance test method thereof | |
| JP6529648B2 (en) | Output device producing variable square wave current with inductive load without high voltage supply | |
| CN107407221A (en) | Method for controlling fuel distributing | |
| CN104569864B (en) | Lighting jig and ignition method | |
| CN110767502B (en) | Method, controller and system for regulating current of coil | |
| CN108240637B (en) | Control method, control system and the gas heating equipment of gas heating equipment | |
| Turkovskyi et al. | The simulation and analysis of the probabilistic characteristics of schemes for power supply of electric arc furnaces in non-symmetric modes | |
| CN106680620B (en) | A kind of novel analog direct current stops method for load dump test | |
| EP3347726B1 (en) | Energizing coil wound on magnetic core and oscillatory testing of transformer | |
| CN109446665A (en) | A kind of NLFM signal optimization method and device, storage medium | |
| Breidi et al. | The impact of peak-and-hold and reverse current driving strategies on the dynamic performance of commercial cartridge valves |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221223 Address after: 241000 west side of 3 / F, No.5 office building, new energy and new materials gathering area, Fuzhou Road, Jiangbei District, Wuhu City, Anhui Province Patentee after: Wuhu Midea intelligent kitchen electricity Manufacturing Co.,Ltd. Address before: 241000 Wanchun East Road, East District, Wuhu Economic and Technological Development Zone, Anhui Province Patentee before: WUHU MIDEA KITCHEN AND BATH APPLIANCES MFG. Co.,Ltd. |